You need to make sure that NON of the exhaust system is under any strain, it has to all be in a relaxed state when fitted or you WILL break things , normally the exhaust studs. So get both headers into the ports and do up loosely, then make sure the silencer fits snuggly against ALL it's brackets. The most reliable front mount is the later dogbone type along with the Maz bracket, fitted correctly with those brackets you will have zero problems with the system . If any of it is under strain it will break .
2001 X1 2009 1125CR 2006 Uly X2 and a fully Maz'd S1